Introduced Windows Aero (transparency), Desktop Window Manager (DWM), Windows Search, User Account Control (UAC), and BitLocker.
Released in 2009, this is considered one of Microsoft's best operating systems. It fixed the performance issues of Vista. Download vista(win7) zip
For testing older compatible builds. 5. Proper Installation via "Zip" (If VHD/VMDK) If the downloaded zip contains a .vhd or .vmdk file: Extract the archive using 7-Zip. Open VirtualBox or VMware . Introduced Windows Aero (transparency)